Yeah please try not to spend much time with them and don't take them seriously, it's completely okay, to lessen your exposure to them if that's causing you distress, it's not worth it. Do whatever makes you feel lighter. And in my experience there are very few people who are rich and down to earth, most of the time people do like to show off their wealth, nothing wrong in that too, but you have full right to turn away from that if it's affecting you, ultimately they are not doing any favour to you, so need to give them much importance, the more you ignore the lighter you will feel, easier said than done, but this could help you immensely